Pipe grinder



Dec; 7, 1948.

Filed June 26, 1946 R. P. DORIAN PIPE GRINDER 4 Shee'ts-Sheec 1 lllllllllllll- *LIIIIIIIIIIIl--I paddy/1P Dorian IN V EN TOR` Hfs TToRNEY:

R. P. DORIAN PIPE GRINDER y Dec. 7, 1948.

4 Sheets-Sheet 2 Filed June 26, 194e Rudolph P Dorian INVENToR.

HIJ f/TTORNEY:

Dec. 7, 1948. R. P. DORIAN PIPE GRINDER Filed June'l26, 1946 4 Sheets-Sheet 3 af, Rada! h 12 Dorian /9 l 26 3 l P INVENTOR.-

HIJ' .aT TORNEY.

R. P. DoRlAN PIPE GRINDER Dec; 7, 1948.

.Filed June 26, 1946 4 Sheets-Sheet 4 Rudolph R Dorfen IN V EN TOR.

His .ATTRNEK Patented Dec. 7, 1948 UNITED STATES PATENT or-"Fics illPEfGRMER f auamphrinorian, wiciiitrails, Tex. t Appifcatidn Jane ze, 194s,` semiNurcvan-a 4 This invention relates `to`intaprovernents; in pipe grinders for* grinding a bevel on or for" cleaning the ends of pipe. 1

While grinders for grindingy and cleaning the ends oi' pipe have been suggested heretofore, these, for the most' part have not` been'entirely satisfactory, in-as-much `as theywere heavy and cumhers-ome,` due to their' design. andl ineffective for performing thework to lieden-e.` I l In a pipe grinder for usein pipe Iinesit is l ite desirable to have a device that is light inf construction, for portability, yet,` that is sufficiently sturdy in constrccti'on and whichwili exert sumcient power' to` clean orbevel the` ends ofpi'pe elliciently and `eilectively;V `vizithoutcausing undue wear on themacl'xine` itselfl l f l The primary object of this invention is tofpio` vide a pipe grinder for pipelines that i's-light in Weight, easily handled,` butY sumciently strongin construction and' sumciently `powerful to cleaner to bevel the ends oi pipe, l l l l Another object of this invention is `to provide apipe grinder for` uselin the Held; that is easily portable, that may be put into operative position by' hand, and which `may be adjusteci iorlusev on various sizes ef pipe.

`A. stili further object of this invention is tolprovide a grinder that will clean or lcvel` the ends of pipe that is simple in constructioi'i,` easy topperate, readily adjustable, and that is` at the same time sufficientlyA sturdy in framework and strong in driving power to perform `eillcientlythe work for which it is designed.

While pipe that is te be used ma pipel une ordinarily is" cut and beveled'by ajgastorcli` be fore it is taken out tothe place of use, in order to weld the ends of the pipe together', it is necessary to clean and finish this roughlyl cutfhevel and to removey the scale that may be. presenten the pipe. The present invention provides forcleaningfand beveling the ends of pipe by a portablegrinder that may be putL into operative positionreadilyby an operator,and yet has sufficient powery to grind the pipe quickly and effectively.

This invention in one crnbmzlimnt,` provides for surfacing an` end of a pipe by means of a flexible abrading disc or other grindingxuembers,.mounted in. a head for planetary movement, whichy head is power driven for eiectiveoperation of said members. Provision is made for moving the members axially into engagement with theend o1' the pipe, and for attaching the machineto the pipe when desired. Themachineis simple in corrstruction, light inveight and; easily portable:

- n iaciaims. (01.519241 grinding Unit;

r lf and secured tothe embodiment of this invention is illustrated in the laccompnanying` drawings,` in which: l Fig; 1 isaperspective view' of the pipe with a part broken away to show the detalls of construction," `and lwithwtl'ie machine shown mounted alpine; which pipe is shown in dot` dashoutlme;

1 zifis a. `persi'iectve view of the drive pulley with partsbroken away and in section, as removed from the machine; i

Fig. 3 is a cross section therethrough; taken on the line 3`3 of F1312;

:Figa is an elevationnlieur` of the machine as mounted on a pipe, whicirpipe is shown in dei:n dash outline; i

5 is a` perspecttveviewf ring i xnerrnlaery with parts `broken im iilustrate details; o1'

of the stationary away and in. secconstruction;

; Fig.*6 is; a cross section View therethrough taken om thezlinef of 5i; i i l is affrontI end view' of the-machine with parte broken; away andv in section. to illustrate de tails of construction; l i

8d: a cross secti through; the planetary 9 is a" side elevation. of the abrading disc nut`detached; l i

l Fig.;10isacrossrsection through the machine.

on the line' W-t'tof 4; and

ii, isa sectional `view tanzen.` on the line l lf-t t a ci' Fig.: L

`im the ofthe invention illustrated, the machine includes ar main supporting frame. comprising a pair of arcuate frame members |f-lf, the innercurvecl suriaces. `of which are semi-circular toextend about `the alter contour of` a pipe to be actedon.: which pipe is designated asP., These arcuate iramememliers |-t are spaced apart and arerigidlywhraced by handle members Z inter posed therebetween and` securedV thereto. While thecenter portionof eachfhandle-memher 2 isiof sitable size `ami shapetobe gripped by the. op. erator `for handling` `the machine, each end portion of the handle member is bi`furcated inI ayolre respective arcuate frame members.. l by set screws 4." to hold said frame members in braced spaced relation as stated above.. Y l

Rods Efpass through holes that are provided in tramey members f--f l and* are freely slidable therein;` being carried by said members. The rear ends of said rods 5 supportati arcuate member G whichis secured thereto as by cap screws 1 (Fig. 4). The forward ends of the `rods 5' carry a; rin: i, split transversely to tire axis thereof, the purtransversely of its axis and is composed of a pair,

of complementary members secured together by 4 against a w-asher 36. The outer portion of the end face of the nut 34 is divergent at 31, tapering to the periphery of the nut, as shown in Fig. 9. It is preferable to have this convex or divergent surface 31 so that when the abrasive disc 33 is flexed outwardly thereagainst, the disc will bend over the sloping surface and is thus prevented from being cut or broken near its center.

. This disc maybe made of cloth, paper, rubber or other suitable iiexible material.

The inner surface of the `abrasive disc, that is,

the surface toward the pulley, preferably is coated with abrasive so that as the abrasive disc 33 is cap screws I3. The inner edge of this ring I 2 .hasj

a recessed dove-tailed groove therein in whicli` isVV secured the inside edge of a V-belt I4 (Figs: 2

and 3), which will be engaged` securelywithin the dove-tailed groove and will project inwardly urged against the end of the pipe, the flexible abrasive disc applies a smoothing action thereon.

i It is driven bythe clutch members 25 engaging the sidesof` the belts I I and I4. Friction is maintained thereagainst, even though the belts may therefrom. The V-belt I4 forms an inner friction rim on the ring I2, like the friction rim formed onthe ring 8 bythe V-b'elt II.- .These rings, as well as the' friction rims -thereof, are spaced apart radially.A in concentric `relation, .as shown in Figs. lail'dl."f c i f c: Int'erposed between]y the spaced friction rings 8 and; I2v are'pairs of idler and ldrive devices, generally designated at I5 and IB (see Figs. lland 8);: These operate nplanetary fashionupon rotation lofthe rotaryring |2.' These devices I5 and I6 are mounted on annular plates Il, secured together-by-bolts I8.l

These annular plates I'l "have bosses I9-I9 (Fig. '11), for each idler' I5 anddriver I6, receiving bearings 28-20. The l bearings 2li-#29. are mounted in chambers 2I-2I which may beefilled with lubricant so aste keep. the bearings lubricated,` `'ifdesired A pulley 22 Vis journaled in the bearings 2li-20, and may be madesub'stantially in Vfpulley form so as to roll between the V-belts I I and I4. A pair of the pulleys 22 hold therings 8 'and I2 in spaced relation, whilethe ringxIZ is being rotated by afmotor;23 through a V'belt 24. The drive device I6, Fig. 8, is' composed'oftwo clutch-'members l2li which are pressed inward by springs 28. The clutch members 25 areslidable ona pulley shaft 2l and will engage betweenbelts II and I4 to cause the rotation ofthe shaft21'. Iih'esl'i-aftlZ'l.` is. journaled in bearings 28-28. Pins 29 pass-throughslots 30' in thexouter ends ofthe clutch members 25.so as to pin the clutch members 25 and the shaft 21 to rotate in unison. The bearings 28-28 are mounted within chambers -3l-3I which may be lled with lubricant if needed. l

- The inner races of the bearings t: tightly on `the shafty of each idler'pulley 22 andv are secured against relative movementvby nuts screwthreaded onto the shaft.. The outer races of the bearings 20 are secured in a shouldered recess of the boss I9 by a cuppedvnut binding the outer race" within the shouldered recess. The inner races of thebearings28 are retained on shaft 21 ina similar manner to the above and the outer races-'of bearings 28 are secured in bosses I'9 by cupped nuts in a manner similar to that above stated. With the inner `and outer races .of the bearings 20 and 28 secured in the manner stated above, free rotation of the shafts is permitted. `One end of theshaft 21 extends outwardly through a cap 32 and has an abrasive device mounted on the outer end thereof. In the. form shown, this abrasive device is preferably an abrasive disc 33 secured thereto by means of a nut 34. The nut 34 has a flat face y35 which will Dndnlypselle :the exible. .abrasive-.- dis.. 33

wear.` by= the springs automatically compensating for this wear and driving the disc 33 without any appreciable -slipping under normal loads. The clutch members 25 serve alsoV as Aspacers to keep the rings 8 and I2 uniformly spaced apart in the samemanner as the pulleys 22. Y

Itis preferable to have the frame work of this machine madeV of a material that is light vin weight, such asv aluminum, so that it can be handled readily and be placed upon or removed from the pipe manually. .Handles 2 have forked ends 3 securedy to the frame4 members I-I. Theseforked ends 3=serve as braces and as means for securing thehandles 2 to the Iframe members I-I. rThe handlesproper arev formed each of a singlerounded member between the forked ends to permit the manual gripping of the handles for lifting the machine and moving it-from place to place. L i y The'arcuate frame `members I-I have holes 38 atene end thereof (Fig. 10), which holes receivethe ends of chain sections 39. The chain sections 39 are coupled together substantially in X-shape, as shown in Fig. 1, to form a chain devica.,v The oppositevend Vof the chain device has resilient members 40 attached thereto, which resilientmembers 4I)A are Aalsoupconnected with spaced portions of a bar 4I, vthe ends `of which bar 4Igare adapted toengagehooks or catches 42 on the opposite ends ofthe arcuate frame membersI-I lfrom'the holes 38. f

vThe arcuate frame `members, I-I `have radial guides 43 (Figs.` 1 and 10) at spaced points to receive spacer4 plates 44. Usually these spacer plates have one hole each' therethrough and throughl which a bolt vvll'secures the' sp-acer to the frame member I, so as to hold the main frame in a denitespaced relationto the pipe P. In order to preventjaccidental m-aladjustment of these plates, one holeis provided so that the plate 44, when turned in :one direction, ywill fit one size Dpe,. and whenturned in the opposite direction will t pipe of a different size, vwhereby to position :the machine` properly on th'epipe. CThe motor 23,'whichmay be of any conven tional type that is suitable for the purpose, is mounted in a, cradle 46 and is secured thereto by means o f bolts .4 1. The cradle 46 is pivoted on one ofthe-longitudinal rods 5 which extend between arcuate members I` and the. stationary ring 8. The tightness of thebelt 24 maybe adjusted by swing. ing themotor 23 and mounting cradle 46` about its axis on one rod 5, and when-the proper adjustment :is obtained .a bolt-18' is used to bindingly engage withy a slotted arm `4.9 to hold the motor :15 23 in theadiusted position;` The arm'lISV is'secure'd :Island purpcee af eiiliistration; l'the 4motor M23 beamer-ewan.

is? :shcwnaslboited "to cradle 46, ahowevergwthe i niotcrnousingfandltnecradiehror supportfmayibep madentegrai,firfdesired. 1111 ,p i i i @In Vthefipiermlpn for :the machine, the spacers u are properly'i linreith'er positibn; iso `Htl-iat thefdevice :mail zml-."prepeliiyupcn the :pipennwhich the lmineratidn` israel-:be Ipertormed-- Once` these spacers `I are adjuste d in the` proper marmer; .no further `acijustment i iwili llbe y necessary as long as theimacirine isf-usedfunpipeofl the same size; 1 The machine-is th'enwseatied on `top `of `the pipe Pf near an' iendlthfere; #Thebar Iii, :which Lisl attracted te sprinasI um :and chains asf-are passed `beneath the pipiexl? :and the bar Mis `pulled against `the tension of the springs 40 until the endsfef the bar llafmay be y'engagelzi with ithe l hnoks 42 on fthe lends `of` 'the arcuate framemembers if-1. IThis will hold 4the fnamefat-izsecurely inplaceon thewpipe and put itin'pcsitienafornperaition; and with the abrasive disc-83 engaging'thewendpf :the pipe Pif i f l* Withrtheznmachine seated in place,` the motor ZSehe-igiZeiiuSUaSfto rotatethe `lwwhich in tunnwl rctatewthewabrelsiye discs 3'3 labout the Maxis fof itheshaftwz fand- 1a1s0 alffmt` the axiscf thepinsel?.` `,By moving vthe thandle rearwardly, i the @inner `"face fof `the abrasive,discs 33 benausedf to engagevthe 4end 1 of` the 1pipe P se :as te 'act thereon andremove the lscale therefrein. pizpensually is beveled to be used in weld-ing eindf `very desirable: Cthat athe" scale be 'removed `tlwiiefrdin. s* iSince` the `disc `is Aflexible the `edrrtitnlcus "nrovement` ci the handle l'allywill cause the 'abrasivediscs tofiiicx about the,bevel cutfentthe Aenti Vof the `,pipe so i ash to i clean the scale fandwether foreign matter lthereirom, moving the abrasive discs" 38 againstlthe `enduof the pipe, `these will be causedtc iiexlbutwardlyas permitted by `the surfacesv `3H on `the nuts 3B' `,Without a` breaking 'action ronf-:the discs at -anyene pointpasv would Ebe the fease if; the :discs were gripped betweentwcplanewslltfaces. nd-Iowfever, centrifugal force exerted by the high speed of eaehwdisc,.'ivilibeiidtcmaintain the disc in a perpendicular position Withwrespect to the shaft 21. This will tendtoeause it to resist the movementent @i `this perpendicular alignment lend considerable pressure is exerted: thereby` on the end of the pipe, yet suiiicient flexibility is inherent so as to permit-the disc to grindbver and around the rou-gh spots on the endmfsbhe pipe P without causing anyserious effect entire Yabrasive fdisc 33.

v'lhe gripping ofthe belts Iifand: @il by thebspring pressed 'clutch member 25 will igivea uniformiteit:- tiimal with thebeltsil l` `I 4 for driving the `shaft 21, `and abrasive fd-iscs "33, anclrwithixa phiiiiality of fidllers and` driveunitsii' and-fl f ameland thefring l2.,` uniform driving offthezdiss isi-assured.' u f i 1f `L`1 It is preferable that the machine be made of light Weight material, such as aluminium, or other suitable material; and that it is entirely free of gears which cause excessive Wear and noise, and the teeth of which are subject to becoming stripum Massenmedien waarnemer the p anwmrelesxlymssemledf and idisessemlw thatla linivihgrelation ismaiiiedlhetween'ithe rntttnrl'mieil theeahrasivez discsszm ua unircm ricmniien'wiet iismbimtlypwltwe itoblwr# atefthewdises* at high speed in lentier imperium i rieqund buttingfactien 'thermal-eti the Pmrhebilerbeasdeseribedo y thermal-either telf-the axis vor pedalen-according :to the cnabresivie dievi'emsed. v "Thereafter :it 'the n i moved readily from thepipe by disconnectmgthe Ski-4 I; after whieh the machine may befiimdfzcilfietheribylcne manier earned ne` thefmxtzpoint bruise The constructim isi Ciightcm rweinfniti web asl tcffbefreadily 4"iporteiiile, andnimiqamsirecteahanutacture. l Itseffectiwe furl thaepmpasei andf'may be fsedf iat `desired liiliill'l..l i 1 i t, mlwlclml i" YT, n y i ,i

linda lifcrftannealing"a fbeveled1end etwas pia avshe'it, al fxible wbmeive disc linfilheishai'ft` and.l lpbsitinneal felilgewise* relativetnereto "incqiifdsitiun` Lforf ieinemgementi my s. 1 side face thereof with the beveled endfloiHtne-f-pipe andrnieansi-for securing the idiscfem the shaft incindinglaiiut at the side efacfithe'riise from theengnglngrace Meer; said mit navman thereoverwithcut bxieakmgprsaid nut being amare# ci'ablyr smaller in"riiiamleter` than .the diameterfci saidl abrasive ldisc Lso1 usi to Valluwftlue `izeniligbf the cuter periphery tiseneof beyond the, diameter lof saidnut imonengagementrwtnsaidfpipe. t 1` il "12v Inder machine :for griniiiwg` `fthe beveled end of a impe; a iframe ladmted nISU be Seatledlnnffthe mrmsngr-fthe shan? axiaiilytoacause meinem c! theldseiwith remilieflthepipe` 3. In a machine for grinding an end of a pipe;

, tnevicemination soffia ,main fname including spadedfiarcuate" fname members adapted to "be mmntedi a pipe,` L abrasive means ,i carried` themebyihdwfiieidble'fdezvice 'for securing the mamitrame Define pipegsaidinexibie idevice lbein'g eenmeotedwvithf the arcuate `Lirame' members at me enditnereof; `er 1:sind arcuatecmembens hamrig a'` lcetcibl at the `ftaapcsite end thereof.; @and adraweconnected 'with *the 4flexible device .and

i detaehnibly'exrgwging' the catches i when wmaehine Lfcirigrindmg therend fof pipe, tiwcdmbinalnm fof a mainframe Vincludingspaced arcuate drame members adpted to "be mounted on a pipe, abrasive means carriedthereby, andina tlextbledevioe ferVJ fseemingifthexfmain rfnamel lon saidniieidbleuevice being mctmtedwith thewarcueterrrame members :at ene lend thereci, ewchriofssaid arcuate" membersf'hving n rcatchat the fi 'mntxosite'` `raid ithereof; f :and i a bar eomiected with the exible device and detachably engaging the catches, said iiexible device having spaced end portions and yieldable means connecting said end portions with opposite end portions of the bar.

y55. In a machineA for grinding an `end ofa pipe, the combination of a mainframeincluding spaced framev membersadapted to be mounted .on a pipe, V'handler members` extending kbetween the framemembers at opposite. sides of--the main frameand constructedto form handlesintermediate .the members for manuall liftingof the frame, each of said'handle membershaving'yokes at'opposite ends `thereof bearing against the inner sides ofithe framexmembersv and means for vsecuring said handlemembers rigidly to ,the frame members. i l

p6.: Inra machinezfor grinding theendxof pipe, the combination ofv a mainframe including spaced frame members adaptedto be mounted on a pipe, a-painof rods. extending slidably` through the' frame. members, `operable abrasive: meansr iconnected with said rods'forfengagingran endof the. pipe, a motor having a driving connection with said abrasive means, a cradle supporting said i* motor,=-means .pivotally mounting said cradle on onezof said rods,fand means forming an adjustable cor'inectionfbetween. -said' cradle andy the i other. rod to adjust'ithe driving connection Withzthe abrasivemeans. r

r7."In a machine ,for grinding the end of pipe, the combination of 1a main frame includingspaced frame membersadapted tobe mounted on a pipe,

a pair'of rodsfextending slidably through the framemembers, operable' abrasive `means conneeted with said rods for' engaging lanlend of the pipe, a motor having ardriving .connection with said abrasivemeans, a cradle: supportingisaid motor and mounted onzoneof said rods.and a handle 'connected with the cradlefor.. moving said motor andthe abrasive means axiallyh relative to the pipe. v.; L= 1 8,'In a.machine` for grinding .an end: of pipe, airame comprising endlmembers-,spaced apart and securedy in opposed i relationy `byffa'ni interconnecting member,- a' second frame mounted von said first' mentioned Aframe and movable witharespect thereto, ,a-motor .mounted on the second frame, an annular member driven by saidmotor; a grinding element forv grinding an end of saidvpipe and having a driving-connection With thegannular member and ahandleconnected: `with said secf` ond `frame for` moving themotorfand `grinding element longitudinally of the'pipe so as to: position the grinding' element to engage an end of said pipe; 1

9. Ina machine for grinding the ends ofpipe, aframe adapted to seat on top of said pipe near an end thereof, a second frame mounted-on said rst mentioned frame and movable with respect thereto, a motor, said movable frame carrying an annular ring member, a drive connection between said motor and said annular ring member for rotating said ringmember about the axis ofsaidy pipe, and vmeans for .guiding said ringfmember including a roller mounted to movein anworbit during rotation of the ringmeniberandreans forming a' yieldable `rotary connectionibetween said ring member and the roller to cause'a driving action of said roller. i r i .10. Ina machinel for grin'dingthefend of a` pipe, a frameadapted to-seat upon' the toplof saidplpe near an end thereof; means vfonsecuring said frame to said pipe', aVsecond-'frame mountedA on said :first-mentioned frame and carryingamoto'r and anannuiar stationaryring, a rotatable ring concentric with saidstationary ring, a drive connection between said Vmotoriand saidfannular rotatable 4ring for rotatingsaid ring yabout the axis of `said pipe, rollersinterposed therebetween forfholding said annularrotatable ring and said stationaryf ring in spaced lrelation, a; rotatable structure disposedintermediate said annular rotatable ring andsaid annular stationary ring and carrying the plurality ofV rollers, anti-friction bearings Within said rotatablestructure journaling said'rollers, a'shaft for rotation about axes parallelrwiththe axis of said pipe, one or.. more of said rollers carrying rotating, shafts which protrude outwardly from said rotatable `structure 'and having a grinding element thereon, means for securing said grinding elementto'said shaft.

f 11, In a machine forgrindingthe end of a pipe, a rotating head comprising spaced concentric ringsga plurality' of rollers interposed `between said rings and holding therings spacedfor'relative rotation, one ofsaid rollers including axially projectinglportions, bearing boxes fixed to onev of the rings and enclosing said axially projecting portions, an Yantifriction bearing mounted in the bearing yboxes `and journaling the projecting portions of the roller. l v i l2. In a machinefor grinding the end of a pipe, a rotating head comprising spaced concentric rings, la plurality lofvrollers interposed between said ringsand holdingv the rings spaced for relative rotation, one of said. rollers including axially projecting portions, bearing boxesflxed to one of the rings and enclosing said axially projecting portions, andjanti'friction*bearings mounted in the bearing boxes `and journaling the projecting portions ofthe rollers, said rings having spaced friction rims thereon'facing opposite sides thereof, one of the ,-rollershaving a clutch element fixed tothe roller in.bearingrelation with said friction ri'msxfor rotation of said roller about its axis duringorbitalmovement thereof between the rims.

)13. In a machineeforgrindingthe ends of pipe, an Ya'rcuatef frame `adapted .torest on the top of said pipe near: an end thereof, and spacers for holdingLthe frame inproper position relative to the pipe,each spacer including a member extending approximately radially of the frame, and a fastening spaced from the center of the spacer and securing the spacerto the frame in reversible relation so as tot spacey said frame a diiferent distance from said vpipe when reversedto accomodate pipeof different diameters.

RUDomSH P. DORIAN.

VREFERENCES errno l The following reflences are ofrecord in the me of. this patent;

I uNfTED STATES rA'rENTs Y Number 1 Date f Name 550,099 Detrick Nov. 19, 1895 1,026,022 i Cremean May 14, 1912 y1,902,188 Schmidt etal: Mar. 2l, 1933 A2,159,287 .Morgan May 23, 1939 52,257,619 f APrin/' Sept. 30, 1941 `2,359,608 Baury Oct.` 3, 1944 Tocci-Guilbert Feb. 26, 1946 

